We got our beta apk build flagged as virus by Google Drive.
We used this services to get more information:
https://www.virustotal.com - related in some way with Google.
https://metadefender.opswat.com
Both were using Ikarus service, the only one flagging the app as virus.
We contacted Ikarus and they replied very quickly and asked us to send the apk on a password protected folder to another specific address. After their analysis they confirmed that it was a false positive.
Maybe this can help others in the same situation.